Between this and caps going bad plus the want for hotter spark many of us just buy new aftermarket coils like Dyna. If you do this keep in mind that coils with less resistance will fire a hotter spark but at the cost of using more voltage and could affect the voltage in your system creating charging issues if you have 30-40 year old bullet connectors that are loose or corroded.
You can replace the wires in stock coils but you need a Dremel to cut into the coil around the lead and epoxy to seal it again when you put on new wires. So you will need to buy a Dremel, plug wires and in all likelihood new caps. Are new coils looking any better now?
With that being said I believe it is NGK that makes a splice connector you might be able to use. If you were to go this route you'd best check the resistance in your caps to see if the fire is getting through them properly. I'd be really surprised that your caps are up to specs if your wires are shot.
6 of one and a half dozen of the other.
